package handlers

import (
	"net/http"

	"galaxy/gamemaster/internal/domain/operation"
	"galaxy/gamemaster/internal/service/commandexecute"
)

// newExecuteCommandsHandler returns the handler for
// `POST /api/v1/internal/games/{game_id}/commands`. The request body
// is engine-owned (`additionalProperties: true`) and is forwarded to
// the service as a `json.RawMessage`. The response on success is the
// engine's payload byte-for-byte; failure outcomes use the canonical
// error envelope per the OpenAPI contract.
func newExecuteCommandsHandler(deps Dependencies) http.HandlerFunc {
	logger := loggerFor(deps.Logger, "internal_rest.execute_commands")
	return func(writer http.ResponseWriter, request *http.Request) {
		if deps.CommandExecute == nil {
			writeError(writer, http.StatusInternalServerError, errorCodeInternal, "command execute service is not wired")
			return
		}

		gameID, ok := extractGameID(writer, request)
		if !ok {
			return
		}
		userID, ok := extractUserID(writer, request)
		if !ok {
			return
		}
		body, err := readRawJSONBody(request.Body)
		if err != nil {
			writeError(writer, http.StatusBadRequest, errorCodeInvalidRequest, err.Error())
			return
		}

		result, err := deps.CommandExecute.Handle(request.Context(), commandexecute.Input{
			GameID:  gameID,
			UserID:  userID,
			Payload: body,
		})
		if err != nil {
			logger.ErrorContext(request.Context(), "command execute service errored",
				"game_id", gameID,
				"user_id", userID,
				"err", err.Error(),
			)
			writeError(writer, http.StatusInternalServerError, errorCodeInternal, "command execute service failed")
			return
		}

		if result.Outcome == operation.OutcomeFailure {
			writeFailure(writer, result.ErrorCode, result.ErrorMessage)
			return
		}

		writeRawJSON(writer, http.StatusOK, []byte(result.RawResponse))
	}
}